Temple-cutter for automatic weft-replenishing looms.



W. GERRARD. TEMPLE CUTTER FOR AUTOMATIC WEFT REPLENISH'I'NG LOOMS.

APPLICATION FILED APR. 23, 1913.

Patented Feb. 16, 1915.

- Inventor. Wilfiium Gerrard,

M HWQ M Attys.

WILLIAM GERRARD, OF BLACKBURN, ENGLAND, ASSIGNDR T0 DRAPER COMPANY, OF

HOPEDAL E, MASSACHUSETTS, A CGBEORATION OF MAINE.

TEMPLE-CUTTER FOR AUTOMATIC WEFT-RElPLENISHING LOOMS.

Application filed April 23, 1913. Serial No. 762,989.

tain new and useful Improvements 1n or Relating to TempleCutters for Automatic \Vet't-Replenishing Looms, of which the following is a specification. 1

This invention relates to automatic looms for weaving in which a temple thread cutter is employed-for cutting off from the edge of the cloth, loose ends of which are, existent after a change or transfer of cop or bobbin. In the majority of looms of this class the temple thread cutter works continuously with the result that it quickly becomes worn to a sufiicient extent to render it dull and inoperative and the present invention has for its object to provide improved means to relieve the temple thread cutter from unnecessary wear so that it will remain in good condition for a considerable period.

According to this invention, the cutter arm, or part that actuates the cutter is connected with a device controlled by the cop or bobbin changing mechanism normally to retain the cutter stationary and out'of operation but to be brought into action at every transfer or change of cop or bobbin and to be retained in action for a suliicient number of picks to insure the cutting of the thread or threads.

The manner in which the invention is put into practice will be described with reference to the accompanying drawing, in which Figure 1 is a sectional end elevation of such parts of an automatic loom as are necessary for the explanation of the improvements, of which one embodiment is shown applied, while Fig. 2 is a corresponding view to Fig. 1, but shows some of-the parts.

in difi'erent positions.

Referring to the drawing, 1 represents the temple thread cutter, which is mounted as usual to occupy a position adjacent the selvage of the fabric, being carried by a suitable bracket 2 attached to the breast beam 3 of the loom. The temple thread cutter comprises a stationary cutting blade 4: and a movable cutting blade 5, the latter having 2. depending heel or arm 6 from which projects a pin 7 around which is coiled one end of a spring 8 whose opposite end is'coiled Specification of Letters Eatent.

Patented Feb. 16, 1215.

around a pin 9 carried by the. cutter head 1. The spring 8 tends to normally hold the movable cutting blade 5 in the position shown in Fig. 2 in which position the heel or arm 6 can be engaged, at each beat up of the lay 10, by an abutment 11 thereon, to cause the movable cutting blade to be actuated in the usual and well known manner.

12 represents the usual rock shaft by which the transfer mechanism is operated in the well known Northrop loom, to effect weft replenishment when called for, and 13 represents the usual taking-up or roughened roller around which the fabric 13 passes to be wound on to the cloth beam 14.

According to my invention, the heel or arm 6 of the movable cutting blade is connected by a suitable attachment 15 passinginthis instance over the breast beam 3 with a barrel, pulley, cam, eccentric, or the like 16 rigidly connected with a mutilated pinion 17 pivotally carried by an arm 18 fast on the rock shaft or changing shaft 12. The pinion ,17 has a fiat 17 .on one portion of its periphery, and a toothed portion 17 and the connection 15 acts under the influence of the spring 8 to rotate the pinion, when the latteris free to move, to present the toothed portion of the pinion to the teeth of a gear 19 rotating with the take up roller 13. The disposition of the arm 18 on the rock shaft 12 is such that when the said arm moves back to normal position after being operated to bring about weft replenishment, it carries the toothed portion 17 of the pinion 17 into mesh with the teeth of the gearlt). The pinion is thus .rotated for a certain time until the flat 1'? on the mutilated pinion is brought opposite to the teeth of the gear 19 as shown in Fig. 1, whereupon its rotation ceases. The partial rotation of the pinion 17 and thus of the barrel, pulley, cam eccentric or the like 16 causes the connection 15 to. gradually draw the heel or arm 6 of the movable cutting blade forward to such a position that it is clear of the usual abutment. 11 on the lay when the latter is in its forward position as in Fig. 1, so that the said cutting blade remains stationary. When the rock shaft 12 is partly turned, in the direction of the arrow A, Fig. 1, to efl'ect weft replenishment, the pinion 17 is carried clear of the teeth of the wheel 19 and the spring 8 returns the movable cutting blade 5fto operative' position as shown in Fig. 2, on which it will be engaged by the abutment 11 at each forward beat of the lay. The partial rotation of the pinion lloccasioned by the return of the movable cutting blade to op ally withdraw the heel of. the movable cut ting. blade out ofthe reach of the abutment. A stop 20 on the pulley or the like 16 is adapted to engage the arm 18 to limit the extent of rotation of the pinion 17 under the pull of the. connection 15.

By the means abovedescribed, the temple thread cutter is only permitted to operate for a pre-determined time after each replenishing action, that is to say, for such a time as will insure thercutting of the end of filling, left. by the exhausted bobbin, extending from the selvage of the fabric.

Thedetails of construction and arrangement of theimprove'ments may be varied, for example in some cases itmay be convenient to control the withdrawal of the movable cuttinglblade from some part of tiilezthanging mechanism other than the rock s a Having thus described my invention, What I claim as new and desire 'to secure by Letters Patent is y 1. In an automatic weft-replenishing loom provided with a temple thread cutter actuated by or through the movement of the lay, the combination of means controlled by or through the changing mechanism of the loom to place the cutter in actuating posi-' tion, and means controlled by or through the take-up roll for throwing the cutter'out of actuating position after a predetermined period.v

2. In an automatic weft-replenishing loom a temple thread cutter having a stationary blade and a movable blade, an actuator connected with the movable blade and adapted to actuate it upon and throughthe beat-up on the lay, a spring acting to move the actuator into the path of the lay, a movable arm,

a mutilated pinion on said arm, a connector extending from sald actuator to said pmlon,

a gear constantly driven and means actuated upon the. call for filling replenishment'to move said arm to carry the pinion away from the gear and allow the spring to act and thereafter to move said arm to bring the pinion into cooperation with the gear and cause the actuator to be withdrawn from the path of the lay after a predetermined period.

3. In an automatic weft-replenishing loom a temple thread cutter having astationary blade and a movable blade, an actuator connected .with the movable blade and adapted to actuate it upon and through the beat-up on the lay, a spring acting to move the actuator into the path of the lay, a movable arm a mutilated pinion on said arm, a

and cause the actuator to be withdrawn from the path of the lay-after a predetermined period.

In testimony whereof I aflix my signature in the presence of two witnesses.

- WILLIAM GERRARD.

Witnesses:

H. WILLIAMS, 0. T, ROHRER. 

